CIUDAD JUAREZ, Mexico – Mexican prosecutors say they are looking into claims that a woman who killed two bus drivers last week in this northern border city was seeking revenge for alleged sexual abuse of female passengers.

The claims made over the weekend in an email from the self-styled "bus driver hunter" echoed deeply in Ciudad Juarez, which has a grim history of sexual violence against women aboard buses.

A woman wearing a blond wig — or dyed hair — boarded one of the school bus-style vehicles that serve as transport in Ciudad Juarez on Wednesday morning. She approached the driver, took out a pistol, shot him in the head and left the bus. The next day, apparently the same woman did exactly the same thing to another driver on the same route.

Over the weekend, media outlets began receiving emails from the address "Diana the hunter of bus drivers."

"I myself and other women have suffered in silence but we can't stay quiet anymore," the email said. "We were victims of sexual violence by the drivers on the night shift on the routes to the maquilas," a reference to the border assembly plants that employ many residents in Ciudad Juarez, across the border from El Paso, Texas. "I am the instrument of vengeance for several women."

The newspaper Diario de Juarez reported that a witness quoted the killer as telling the second victim, "You guys think you're real bad, don't you?" before shooting him.

Authorities have not verified the authenticity of the email, or of a Facebook page set up under a similar name Aug. 31.

But Arturo Sandoval, spokesman for the Chihuahua state prosecutors' office, said Monday that the vigilante claim is considered one of the working hypotheses in the crimes. There was no apparent robbery involved in the killings.

Mexico scares me. I wouldn't go to Mexico without being heavily armed and wearing body armor lol. Between the murderous drug cartels and now this woman offing bus drivers this can't be helping the tourism industry. "Come for the food leave with bullet hole".

Sometimes people feel the only recourse is to take the law into your own hands and handle things yourself.

In some places that's all you have, though, when the government/police doesn't take you seriously or have time for things like this. I know it's an even bigger problem in places like South Africa--it's practically considered normal and nobody does anything to stop it.

Mexico scares me. I wouldn't go to Mexico without being heavily armed and wearing body armor lol. Between the murderous drug cartels and now this woman offing bus drivers this can't be helping the tourism industry. "Come for the food leave with bullet hole".

Mexico scares me. I wouldn't go to Mexico without being heavily armed and wearing body armor lol. Between the murderous drug cartels and now this woman offing bus drivers this can't be helping the tourism industry. "Come for the food leave with bullet hole".

I'm sure there are lovely places in Mexico as it is one of the most visited places for tourism.

I'm sure there are lovely places in Mexico as it is one of the most visited places for tourism.

Yeah but still even then id be scared. I'd have to take a plane. going there by car is asking for it because you'd have to go through the border towns which are the main places for the drug cartels. I don't know how it is in the center of the country though.

Mexico scares me. I wouldn't go to Mexico without being heavily armed and wearing body armor lol. Between the murderous drug cartels and now this woman offing bus drivers this can't be helping the tourism industry. "Come for the food leave with bullet hole".